This class comprises types of properties. Typically, instances of S9 Property Type would be taken from an ontology or
terminological system. In particular, instances of this class can be used to describe in a parametric way what kind of properties the
values in scientific data sets are about. By virtue of such descriptions, numeric data can be interpreted as sets of propositions in terms
of a formal ontology, such as “concentration of nitrate”, observed in the ground water from a certain borehole.